Home / 642,558.80-886,736.28-356,083.64

Finding the Fourth Proportional to 642,558.80, 886,736.28 and 356,083.64

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Solution

The fourth proportional to 642,558.80, 886,736.28 and 356,083.64 is: 491,398.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,558.80 : 886,736.28 = 356,083.64 : x
  2. Step 2: Convert to fraction form
    642,558.80/886,736.28 = 356,083.64/x
  3. Step 3: Cross multiply
    642,558.80x = 886,736.28 × 356,083.64
  4. Step 4: Simplify right side
    642,558.80x = 315,752,282,302.46
  5. Step 5: Solve for x
    x = 315,752,282,302.46/642,558.80
  6. Step 6: Final answer
    x = 491,398.27

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.